Spindle for tubular yarn carriers



June 12, 1951 D. A. cABoTEr-AL SPINDLE FOR I'UBULAR YARN CARRIERSATTQRNEY Filed April 26, 1949 Patented June 12,?*1951 SPINDLE FORTUBULAR YARN CARRIERS Deane A. Cabot, Rumford, R. I., and Fausto G. DeSantis, Quincy, Mass., assignors, by mesne assignments, toReconstruction Finance Corporation, Washington, D. C., a corporation ofthe United States Application April 26, 1949, Serial No. 89,748

3 Claims.

This invention relates to spindles vfor spinning frames or analogousmachines and more particularly, to a novel spindle structure especiallyadapted for use with top suspension tubular yarn carriers made of paperor of a cellulose ber composition, which are well known yarn carryingdevices the upper portion of which is designed to be l erances for fitsbetween the parts; by the facility with which it may be assembledwithout distortion or eccentricity; and by its eiectiveness in operationin that it provides for easy stripping after doing, is capable of lowpower consumption and retains proper balance vwhen rotating at highspeed thereby avoiding the `undesirable difficulties and problems ofunbalance which must be 'dealt with to obtain true running spindles andwhich will occur when spindles of the tube'type are used having barrelsmade of woodwhich `material is subject to inherent differences indensity in different portions of the barrel and to dimensional changesin shape or form thereof caused by heat and humidity variations.

With the above and other considerations in mind, it is proposed inaccordance with the present invention to include in the rotatingstructure of the spindle between the whirl and a top tip element anintermediate barrel member in the form of a metallic tubular element inradially spaced encircling relation about the spindle blade and forminga permanent part of the spindle. According to one feature of theinvention, the

tube, in its preferred form, is composed wholly of a light weight metal,such as an aluminum alloy or a magnesium alloy, arranged to be securedat its opposite ends by frictional connection with an axial extension ofthe whirl and a tip element fast to the upper end of the spindle blade.The whirl with its axial extension and the tip element which forms thebobbin plug each are composed of a harder metal, such as cast iron andsteel respectively. The tip element and the whirl extension each areprovided with one or more resilient or elastic rings made of eithersolid natural or synthetic rubber compounds, of round cross-sectionalform, one commercially available type being known under the trade nameof O rings of which 2 one manufacturer is Linear, Inc., Philadelphia,Pennsylvania.

The various objects and advantages of this invention will be moreapparent upon considering the rfollowing detailed description of apreferred embodiment of the invention illustrated in the accompanyingdrawings, and the novel features of the invention will Vbe particularlypointed out in the appended claims.

' In the drawings:

Fig. 1 is a vertical sectional View of a spindle constructed inaccordance with this invention and rotatably supported inV a customarymounting, and showing a tubular yarn carrier in normal operaingposition;

Fig. 2 is a fragmentary View in vertical section, on enlarged scale,showing the lower O ring in section and in a compressed state connectingthe lower end of the tubular barrel member lto the Whirl;

Fig. 3 is a fragmentary view in vertical section, on enlarged scale,showing the top O ring in a compressed state connecting the upper end ofthe tubular barrel member to the tip member;

Fig. 4 is a perspective view of one of the elastic O rings prior toassembly on the spindle blade;

Fig. 5 is a fragmentary view in vertical section similar to that of Fig.2 but on smaller scale and with the outer tubular spindle barrel and thepaper yarn carrier removed;

Fig. 6 is a perspective view of the metallic retainer collar for thelower O ring, and shown prior to assembly on the tapered portion of thespindle blade within the whirl cup, and

Fig. 7 is a fragmentary sectional view of the lower cylindrical portionof the bobbin plug showing thel normal circular cross-sectional form ofthe O-ring prior to its assembly and insertion within the tubular barrelmember.

` Referring first to Eig. 1, the spindle construction there showncomprises a blade member II) which may be of the usual form and may bemounted for rotation in any usual or convenient manner relative to astationary support or base I2 aixed to the usual spindle rail I3. Theblade member I0 has a tapered upper portion I4, a cylindrical bearingportion I5 and a tapered lower portion I6 terminating in a conical endportion II. A whirl I8 is fast to the lower part of the tapered portionI4 and includes an axial exten-y sion or acorn 20 the top of which isrecessed (sce Fig. 5) to present a cup-like portion 2| with anupstanding annular rounded peripheral flange 22 having a vertical innerwall 23. vIn addition, vthe upper portion I4 of the blade is equippedwith an encircling tubular barrel member 25 consisting of a hollow metalcylinder or tube made of a light metal such as an aluminum alloy or amagnesium alloy.-

Disposed interiorly of the cup 2Iand pressed onto the tapered portion I4of .the spindle blade is a beveled retainer collar 26 of suitable metal.

having a smaller outer diameter than the inside diameter of the cup 2Ito provide an annular groove 2l' of square cross-section between thevertical inner wall surface of the cup 2I` and the outer verticalcircumferential face 26 of the collar 26.

Placed in the annular groove 2'! between the retainer collar 26 andthe'inner vertical wall 23v of the ange 22 is a resilient or elastic Oring 3U of solid rubber-like material, made of either'k natural orsynthetic rubber compounds, of round" cross-sectional form. Y

In practice, the O ring 35 may be of such .size and cross-sectionaldiameter that it will' lie snugly against the bottom and side walls ofthe groove 2. In assembly of the tubular barrel 25 with the whirl andwith the Ol ring 36 initially positioned within the groove 2?, as justdescribed, ythe lower end portion of the tube 25 is inserted finto thecup 2I and has an easy sliding iit or a hand push t with the-inside wallsurface 23 of the annular ange 22 untilv the lower end of the tubeengages the adjacent upper corner portion of the ring 36 whereupon thetube 25 in being forcedfurther downward against the O ring 3i!thereafter causes the ring to be compressed andrflattened against thebottom and vertical side Walls of the groove 2, as shownY in Fig. 2; y.At its upper end the tube 25 abuts an annular shoulder 35, Fig 3,disposed exteriorlyaround the lower part of a tapered tip element orbobbin plug 36 which is pressed onto the upper end of the taperedportion I oi the spindle blade member 36. The bobbin plug 36 is-thereshown as having a stepped formation with a rounded top portion 3l and atapered longitudinally extending body portion 38 which extendsdownwardly therefrom terminating at its base edge at the shoulder orstep 35fornied at the meeting line of the reduced cylindrical endportion 39 with the body portion 8. `The bobbin plug 36 is counterboredfrom its lower endk to form the enlarged central cylindrical recess 46extending inwardly of cylindrical pori tion 39 and communicating at itsinner end with .the central bore 4I in the top wall of the plug 36.IThebore il has its sides formed to the same taper as the upper end ofthetapered portion I4 of the spindleblade, and the tip ispressed tightlyonto the spindle blade.

As shown in Fig. E, the cylindrical lower end portion 3.9 of the bobbinplug 36 extends within the tube and is slightly reduced and of smallerouter diameter than the inside diameter of the tube 25. rihe cylindricalportion 39 carries a .resilient or elastic O ring 45 which is positionedwithin a peripheral groove 46 formed at an intermediate section of thecylindrical portion and of square crosssectionhaving flat parallel sidewalls normal to the axis of the cylinder 39, as illustrated in Fig. 3.The O ring v@Slis of circular cross-section prior to its assembly vandinsertion within the tubular barrel 25, as illustrated in Fig. '7. Theinner perphery ofthe ..O- ring is slightly less in circumference thanthe circumference of the bottoni of the groove 46 in the bobbin plug 36while the exterior peripheral circumference of the ring i5 is greaterthan Athecircumference of. the inner cylindrical {wallof the tube 25 sothat when the O ring 45 is forced into the upper end of the tube 25 thering 45 will be compressed into the cross-sectional shape shown in Fig.3 of somewhat elliptical cross-section with flattened peripheralportions abutting the, side and bottom walls of the groove 46. Thus,when the O ring 45 is compressed within its associated groove, the ringliattens out from the circular cross-sectional form shown in Fig. 7 tothat shown in Fig. 3 so that the peripheral portion of the ringcontacting with the bottom of the groove 46 is at as Well as its outerperiphery which directly contacts the inner cylindrical wall surface ofthe tubular barrel 25 at its top end. Likewise, both sides of the O ring45 which are in contact with the side walls of the groove 46 becomeflattened out against the side walls since the width of the groove 46 isinitially made slightly greater than the diameter of the circularcross-section of the Orfring 45. In one practical embodiment of theinvention the bobbin plug 36 carriedl inthe groove 46 an O ring .45theinside diameter of which was nine sixteenths of an inch and acircular section diameter of three thirty-seconds of aninch. The groove46'was made one hundred eight thousandths of an.v inch in width orapproximately iifteen thousandths. of an inch Wider than the circularsection diameter of the ring 45While the depth of the groove. 46 wasmade such that the ring 45 of normal circular section, when installed intheA grooveV 4.6, projected` outwardly from the groovev to the extentofrom ten to twenty thousandths of an inch.

The bobbin or tubular yarn carrier shown in Figs. 1,2 and 3. is of aconventional formV and comprises a tapered tubular body portion50 madeof paper., laminated bonded celluloseY fiber,` or otherl suitablematerial havingr the desired length and wall thickness, and provided'with an internal full-length taper conforming to. that of` the` taperedportion 33 of the bobbin plug 36 so that when the bobbin is pushediirrnly onto the. bobbin plug the upper end portion interiorly of thebobbin. .will tightly eng-age the tapered exterior por.- tion 380i thebobbin plug and in thisway establish a detachable but positive drivingconnection of the bobbin 50 with the bobbin plug 36.

According to the preferred.v method of assembling the parts of thespindle, the whirl I8 isY first. pressed onto the tapered upper portionI-4 ofthe blade in accordance with the usual practice. employed in themanufacture of spindles. Next the beveled retainer ring 26 is placedupon the ta-` pered upper portion I4 of the blade and forced downintotightlseating engagement with thefbottom of the cup 2I.v The resilient Oring 36. is applied over the upper end of the blade member II] andplaced in the annular groove 21 between the retainer ring 26 and theinner wall surface of the cup 2|. v Y 1 Next, the barrel tube 25 is slidover the tapered upper portion I4 of the blade and pushedv down into thecup until the lower end of the tube seats upon the O ring 36. Thetapered tip or bobbin plug 36 then is placed upon the tip endl of thetapered blade'portion I4r and forced down thereon in a suitable manner,asby means of a hydrau-l end of the tube 25 will rmly abut the shoulder35, the resilient O ring 39 will be deformed as shown in Fig. .2` underendwise pressure of the tube 39, and the resilient O ring i5 will becompressed laterally into generally elliptical or flattenedcross-section, as shown in Fig. 3, to rmly grip the inner peripheralsurface of the tube 25 at its upper end.

It is to be understood that the length of the spindle blade portion i@will be made to suit the particular length of bobbin or tubular yarncarrier to be normally employed with the spindle and, since such bobbinsor tubes are made in a variety of sizes and lengths, the spindle bladesection i4 accordingly will be made slightly longer than the lengthrequired for the bobbin length selected andthe excess material of theblade subsequently cut off after the bobbin plug 36 has been pressedtightly onto the blade at the desired predetermined location thereonwith respect to the bottom of the whirl for the bobbin to be utilized.

lt will be observed from the foregoing description that the presentinvention provides a novel form of spindle construction for tubular yarncarriers which in the course of assembly operations eliminates anypossible chance of bending the blade member during lpressing of thebobbin plug and tubular aluminum alloy or magnesium alloy barrel ontothe spindle blade and whirl, respectively. It will be observed furtherthat the O rings 38 and 45 eiectively isolate substantially both endportions of the tubular barrel 25 from the cast iron acorn of the whirland the steel bobbin plug 38 respectively, thus eliminating anypossibility of galvanic corrosion of the aluminum or magnesium tubewhich will generally be subject to such attack in assemblies with steel,brass, copper, lead, tin or nickel when moisture or other conductingliquids penetrate'into the joint.

What is claimed is:

1. A spinning spindle for tubular yarn carriers comprising a centralsupport, a tip member fast to the upper end of said support, a whirlfast to said support and well spaced axially thereon from said tip, saidwhirl having an axial eXtension 'presenting an enlarged recess in itstop end, a tubular barrel member spaced about said support and extendingaxially thereof between said whirl extension and said tip, said tiphaving a shoulder closing the upper end of said tubular member and acylindrical lower end portion formed with a circumferential grooveextending within the upper end portion of the tubular member and inradially spaced relation thereto, an annular resilient rubber memberwithin said groove and in a compressed state radially between the innersurface of the upper end of said tubular member and the exterior of saidcylindrical end portion of said tip, and an annular resilient rubbermember within the recess of said axial extension of said whirl and in acompressed state 8 Vforming a bottom seat yieldably supporting the lowerend of said tubular barrel member.

2. A spinning spindle for tubular yarn carriers comprising a blademember, a whirl fast to said blade member, the top of said whirl beingrecessed to provide a cup portion with an upstanding annular outerflange, a tip member fast to the upper end of said blade member, atubular barrel member about and spaced from said blade member, said tubeextending between said tip member and said whirl and having its lowerend disposed within said cup and engaging the inner surface of saidannular flange with a sliding fit, an annular resilient rubber O ringmember within said cup and abutting the bottom end of said tube, saidring being held in a compressed state to seat and yieldably support saidtube, and an annular resilient rubber O ring member in a compressedstate and radially disposed between the upper end portion of said tubeand said tip member.

3. A spinning spindle for tubular yarn carriers comprising a blademember, a whirl fast on said blade member and having an axial extensionthe top of which is formed with a cup-like recess, a tip member fast tothe upper end of said blade member, a tubular barrel member spaced aboutand extending between said whirl and said tip, said tip abutting theupper end of said tube and having a reduced cylindrical lower endinserted within but spaced radially from the upper end portion of saidtube, an annular resilient rubber O ring member carried by said reducedend portion of said tip and having a tight litV within the upper 'end ofsaid tube, the lower end of said tube extending within said cup-likerecess of the whirl and engaging the annular outer walls of said cupwith a push-fit, an annular metallic retainer member within said cup andfast to said blade member, the outer peripheral surface of said retainermember and the inner wall surface of said cup defining an annular groovewithin said cup, and an annular resilient rubber O ring member withinsaid groove and being held in a downwardly compressed state to form abottom seat yieldably supporting the lower end of said tube within saidcup.

DEANE A. CABOT. FAUSTO G. DE SANTIS.

REFERENCES CITED The following references are of record in the le ofthis patent:

, UNITED STATES PATENTS Number Name Date 2,168,248 Staufert Aug. 1, 19392,246,475 Stahlecker June 17, 1941 2,485,959 Davies Oct. 25, 19492,488,879 Pichette Nov. 22, 1949 Y FOREIGN PATENTS Number Country Date562,849 Great Britain July 19, 1944

